Conjugated Estrogens EP Impurity B CAS 56050-05-6

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.56050-05-6
Molecular FormulaC18H21O5S
Molecular WeightN/A
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Conjugated Estrogens EP Impurity B CAS 56050-05-6 chemical structure

Description

CATO manufactures Conjugated Estrogens EP Impurity B under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Conjugated Estrogens EP Impurity B (CAS 56050-05-6) is a certified pharmaceutical impurity reference standard with the molecular formula C18H21O5SNa and a molecular weight of 372.41 g/mol.

Owing to a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage, Conjugated Estrogens EP Impurity B is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 372.41 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.

Physical & Chemical Properties

Molecular FormulaC18H21O5S Na
Molecular Weight372.41 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)8.5
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1973
Sulfur Atoms1

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